I agree with Steve on this, that it almost sounds like it COULD be a reamer problem. If the chamber is cut oversize, it will cause this, but the easy way to tell is how hard is it to full length size brass. If the chamber is in fact oversize, than it makes sizing very difficult, lots of lube and elbow grease. If you aren't experiencing this, and they re-size easily, than it is most likely a soft brass issue. What load are you using?
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